<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>主页</title>
    <style>
        body{
            padding: 10px;
            background-color: #F0F000;
        }
        div{
            margin-top: 10px;
        }
        .div01{
            height: 50px;
            width: 100%;
            background-color: #ffffff;
            margin-top: 0px;
        }
        .div02{
            height: 200px;
            width: 100%;
            background-color: #ffffff;
        }
        .div03{
            margin-top: 10px;
            height: 100px;
            width: 100%;
            background-color: #ffffff;
        }
        .div04{
            height: 200px;
            width: 100px;
            background-color: #ffffff;

        }
    </style>
</head>
<body>
    <div class="div01">

    </div>
    <div class="div02">

    </div>
    <div class="div03">

    </div>
    <div class="div04">

    </div>
</body>
</html>